Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications15 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Variant / construction | Spherical roller bearings | |
| Bore diameter | d | 55 mm |
| Outside diameter | D | 120 mm |
| Width | B | 43 mm |
| Basic dynamic load rating | C | 280 kN |
| Basic static load rating | C0 | 280 kN |
| Fatigue load limit | Pu | 30 kN |
| Reference speed | nref | 4300 r/min |
| Limiting speed | nG | 5600 r/min |
| Mass | ≈m | 2.32 kg |
| Precision class | Normal, bore to P5 and outside diameter P6 | |
| Internal clearance | C4 | |
| Sealing | Without | |
| Cage | Surface-hardened sheet metal | |
| Lubricant | None |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 55.0 mm | |
| Outside diameter | 120.0 mm | |
| Width | 43.0 mm |
Product identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Official product category | Spherical roller bearings | |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/spherical-roller-bearings | |
| Structure group ID | BS2_001 | |
| Available from SKF | Yes | |
| Remanufacturable | No |
Engineering — Abutment dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 66 mm |
| Diameter of housing abutment | D a | max. 109 mm |
| Radius of fillet | r a | max. 2 mm |
Engineering — Calculation data12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| SKF performance class | SKF Explorer | |
| Basic dynamic load rating | C | 280 kN |
| Basic static load rating | C 0 | 280 kN |
| Fatigue load limit | P u | 30 kN |
| Reference speed | 4300 r/min | |
| Limiting speed | 5600 r/min | |
| Limiting value | e | 0.35 |
| Calculation factor | Y 1 | 1.9 |
| Calculation factor | Y 2 | 2.9 |
| Calculation factor | Y 0 | 1.8 |
| Permissible rotational acceleration for oil lubrication | 765 m/s² | |
| Permissible linear acceleration for oil lubrication | 255 m/s² |
Engineering — Dimensions12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm |
| Deviation limits of mid-range bore diameter | t Δdmp | -0.009 to 0 mm |
| Outside diameter | D | 120 mm |
| Deviation limits of mid-range outside diameter | t ΔDmp | -0.013 to 0 mm |
| Width | B | 43 mm |
| Deviation limits of ring width | t ΔBs | -0.06 to 0 mm |
| Shoulder diameter of inner ring | d 2 | ≈ 70.1 mm |
| Shoulder/recess diameter of outer ring | D 1 | ≈ 102 mm |
| Width of lubrication groove | b | 5.5 mm |
| Diameter of lubrication hole | K | 3 mm |
| Chamfer dimension | r 1,2 | min. 2 mm |
| ISO tolerance class for dimensions | Normal, bore to P5 and outside diameter P6 |
Engineering — Engineering specifications1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Bore type | Cylindrical |
Engineering — Radial internal clearance2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Minimum initial clearance | 90 µm | |
| Maximum initial clearance | 120 µm |
Engineering — Tolerances of run-out5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Range of section height at inner ring of assembled bearing | t Kia | 5 µm |
| Maximum run-out of inner ring side face to the bore | t Sd | 8 µm |
| Range of section height at outer ring of assembled bearing | t Kea | 10 µm |
| Perpendicularity of outer ring outside surface | t SD | 4.5 µm |
| ISO tolerance class for geometrical tolerances | P5 |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 2.32 kg | |
| eClass code | 23-05-09-11 | |
| UNSPSC code | 31171510 |
Performance5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 280.0 kN | |
| Basic static load rating | 280.0 kN | |
| Reference speed | 4300.0 r/min | |
| Limiting speed | 5600.0 r/min | |
| SKF performance class | SKF Explorer |
Properties11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Number of rows | 2 | |
| Locating feature, bearing outer ring | Without | |
| Bore type | Cylindrical | |
| Cage | Surface-hardened sheet metal | |
| Radial internal clearance | C4 | |
| Tolerance class for dimensions | Normal, bore to P5 and outside diameter P6 | |
| Tolerance class for run-out | P5 | |
| Sealing | Without | |
| Lubricant | None | |
| Relubrication feature | With | |
| Indicative carbon footprint for new product | 8.6 kg CO 2 e |
